Improvement in sizing and waterproofing paper



UNITED STATES ATENT FrrcE.

JOHN N. SIGEL, OF ALEXANDRIA, VIRGINIA, ASSIGNOR TO HIMSELF AND ROBT.PORTNER, OF SAME PLACE.

IMPROVEMENT IN SIZIN G AND WATERPROOFING PAPER, 860- Specificationforming part of Letters Patent No. llfl ll, dated J annary 12, 1864.

To all whom it may concern:

Be it known that I, JoHNN. SIGEL,-of the city and county of Alexandria,in the State of- Virginia, have invented a new and improved process forsizing paper, cloth, or other fibrous material to render it water-proofand increase its strength and durability; and I do hereby declare thefollowing to be a full and exact description of the same.

I take resin, shellac, sandarao, or any other water-proof gum which maybe found suitable, and dissolve it in a caustic alkaline solution. Ithen add to the solution a sufficient quantity of chloric acid to bleachthe material, remove the viscid oily matter from the gum, andprecipitate the remainder. This precipitate is 1 then removed anddissolved in alcohol, ether, turpentine, or any other suitable spirit.The paper, cloth, or other material is thoroughly saturated with thelast-named solution, either by immersion or flowing, or by brushes orrollers, or other suitable means, and may be passed through rollers toassist thepermeation of the solution. It is then dried in any suitableway, for which purpose heated rollers may be employed, if desired.

The above-described processis of great value for making imitationparchment or preparing paper for bank-notes and documents where strengthand durability are requisite. I have also applied it with verybeneficial effect to paper currency and documents already printed and inuse, the ett'ect upon such, when partly worn, being to restore a smoothglossy surface and render the material stronger and more durable thanwhen new.

I do not restrict myself to the specific materials herein named; butpropose to use any others of analogous character which will effect thedesired objects. Neither do Iliinitmyself to any particular quantitiesor proportions; but

What I claim as new, and desire to secure by Letters Patent, is

The process above described for treating fibrous materials to renderthem water-proot and increase their strength and durability.

The above specification of my new and useful process for sizing paperand other material signed by me this 27th day of October, 1863.

JOH. N. \SIGEL.

